While modern ships rely heavily on Global Positioning Systems (GPS) and Electronic Chart Display and Information Systems (ECDIS), celestial navigation remains a .
: One of its most frequent modern uses on large merchant vessels is for compass calibration and error checking when no terrestrial references are available .
Practical celestial navigation requires a specific set of tools and data sources :
While modern ships rely heavily on Global Positioning Systems (GPS) and Electronic Chart Display and Information Systems (ECDIS), celestial navigation remains a .
: One of its most frequent modern uses on large merchant vessels is for compass calibration and error checking when no terrestrial references are available .
Practical celestial navigation requires a specific set of tools and data sources :